/*
 * Copyright (c) 1997, 1998, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package java.awt;

import java.awt.image.Raster;
import java.awt.image.WritableRaster;

/**
 * The <code>CompositeContext</code> interface defines the encapsulated
 * and optimized environment for a compositing operation.
 * <code>CompositeContext</code> objects maintain state for
 * compositing operations.  In a multi-threaded environment, several
 * contexts can exist simultaneously for a single {@link Composite}
 * object.
 *
 * @see Composite
 */

public interface CompositeContext {

  /**
   * Releases resources allocated for a context.
   */
  public void dispose();

  /**
   * Composes the two source {@link Raster} objects and places the result in the destination {@link
   * WritableRaster}.  Note that the destination can be the same object as either the first or
   * second source. Note that <code>dstIn</code> and <code>dstOut</code> must be compatible with the
   * <code>dstColorModel</code> passed to the {@link Composite#createContext(java.awt.image.ColorModel,
   * java.awt.image.ColorModel, java.awt.RenderingHints) createContext} method of the
   * <code>Composite</code> interface.
   *
   * @param src the first source for the compositing operation
   * @param dstIn the second source for the compositing operation
   * @param dstOut the <code>WritableRaster</code> into which the result of the operation is stored
   * @see Composite
   */
  public void compose(Raster src,
      Raster dstIn,
      WritableRaster dstOut);


}
